2479-49-4

Basic information

• Product Name: 4,4'-Carbonyldiphthalic acid
• Synonyms: Benzophenone-3,3',4,4'-tetracarboxylic acid;BENZOPHENONE TETRACARBOXYLIC ACID;BTA;3,3',4,4'-BENZOPHENONETETRACARBOXYLIC ACID;4,4'-CARBONYLDIPHTHALIC ACID;2-Benzenedicarboxylicacid,4,4’-carbonylbis-1;3,3’,4,4’-Diphenylketonetetracarboxylicacid;4,4’-carbonylbis-2-benzenedicarboxylicacid
• CAS NO: 2479-49-4
• Molecular Formula: C₁₇H₁₀O₉
• Molecular Weight: 358.26
• EINECS: 219-613-1
• Product Categories: Industrial/Fine Chemicals;Organic acids
• Mol File: 2479-49-4.mol
• Article Data: 9

Chemical Properties

• Melting Point: 224 °C
• Boiling Point: 734.042 °C at 760 mmHg
• Flash Point: 99 °C
• Appearance: /
• Density: 1.646 g/cm³
• Storage Temp.: 2-8°C
• PKA: 2.43±0.10(Predicted)
• CAS DataBase Reference: 4,4'-Carbonyldiphthalic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4,4'-Carbonyldiphthalic acid(2479-49-4)
• EPA Substance Registry System: 4,4'-Carbonyldiphthalic acid(2479-49-4)

Safety Data

• Hazardous Substances Data: 2479-49-4(Hazardous Substances Data)

Usage

General Description

4,4'-Carbonyldiphthalic acid, also known as terephthaloyl chloride, is a chemical compound composed of two phthalic acid units joined by a carbonyl group. It is an important intermediate in the production of high-performance polymers such as polyimides and polyesters. 4,4'-Carbonyldiphthalic acid is primarily used as a monomer in the synthesis of high temperature resistant and mechanically strong materials, including engineering plastics, films, and fibers. It also serves as a building block for the production of aromatic polyamides and polyesters, which are widely used in the aerospace, automotive, and electronic industries due to their excellent thermal, mechanical, and electrical properties. Additionally, 4,4'-Carbonyldiphthalic acid has potential applications in the development of advanced materials for various technological and industrial applications.

Upstream product

• 726-05-6 1,1-bis-(3,4-dimethylphenyl)-methane 
• 95-47-6 o-xylene 
• 2421-28-5 dianhydride of benzophenone-3,4,3',4'-tetracarboxy acid 
• 4659-48-7 3,3',4,4'-tetramethylbenzophenone 
• 89-05-4 1,2,4,5-benzenetetracarboxylic acid 
• 34240-10-3 5-methyl-1,2,4-benzenetricarboxylic acid 
• 528-44-9 1,2,4-benzene tricarboxylic acid 
• 88-99-3 benzene-1,2-dicarboxylic acid 

Downstream Products

• 2421-28-5 dianhydride of benzophenone-3,4,3',4'-tetracarboxy acid 
• 10595-33-2 diphenylmethane-3,3',4,4'-tetracarboxylic acid 
• 1372196-16-1 hexakis(3,4-dicyanophenyl)[3]radialene 
• 1372196-17-2 4,4'-methyldiphthalonitrile 
• 6889-33-4 4,4'-methyldiphthalamide 

Relevant articles and documents

Multifunctional finishing of cotton fabrics with 3,3′,4,4′- benzophenone tetracarboxylic dianhydride: Reaction mechanism

Aqueous solutions of 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BPTCD) were successfully employed in treatment of cotton fabrics to bring multiple functions onto the cotton cellulose. The overall reaction mechanism of the chemical finishing process was investigated. Results revealed that the dianhydride groups of BPTCD were hydrolyzed to tetracarboxylic acid groups, and the acid could directly react with hydroxyl groups on cellulose under the catalyst sodium hypophosphite to form ester bonds. Such a mechanism is different from the mostly recognized formation of anhydride from polycarboxylic acid and then esterification between the anhydride with hydroxyl groups. FTIR, DSC and thermogravimetric analyzer (TGA) were employed in the analysis of the reactions, respectively.

Method for preparing 3, 3', 4, 4'-benzophenone tetracarboxylic acid

In a method for oxidizing 1,1-bis-(3,4-dimethylphenyl)-alkane with nitric acid in a pressure vessel to produce 3,3',4,4'-benzophenone tetracarboxylic acid with concurrent formation of nitric oxide, passing nitric oxide from the pressure vessel into an absorption vessel and reacting nitric oxide in the absorption vessel with molecular oxygen and water to produce an aqueous nitric acid solution prevents discharge of nitric oxide, avoids the risk of oxygen inhibiting the nitric acid oxidation and reduces nitric acid consumption when the nitric acid from the absorption vessel is used for oxidizing the 1,1-bis-(3,4-dimethylphenyl)-alkane.

A 3,3 the [...], 4,4 the method for preparing [...] -benzophenone tetracidic dianhydride

The invention discloses a method for synthesizing 3,3',4,4'-benzophenonetetracarboxylic dianhydride by taking o-xylene and bis(trichloromethyl) carbonate as raw materials. The method comprises the steps of: by taking o-xylene and bis(trichloromethyl) carbonate as the raw materials, performing acylation reaction in catalysis of anhydrous lewis acid, thus obtaining bis(3,4-ditolyl)methanone; fully oxidizing bis(3,4-ditolyl)methanone in a potassium permanganate/hydrochloric acid system, and carrying out filtration, concentration, crystallization and the like to obtain 3,3',4,4'-benzophenonetetracarboxylic acid; performing vacuum high-temperature melting and dehydration to 3,3',4,4'-benzophenonetetracarboxylic acid to obtain the 3,3',4,4'-benzophenonetetracarboxylic dianhydride product. The preparation method has the advantages of being simple in technology, high in yield, fewer in three wastes, capable of recycling anhydrous lewis acid, low in production cost and easy for industrial implementation, and the like.